package com.atguigu.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.commonutils.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {
    //因为SubjectExcelListener不能交给spring进行管理，需要自己new，不能注入其他对象
    //因为SubjectExcelListener不能交给Spring进行管理，需要自己New，不能注入其他对象不能实现数据库操作不能实现数据库操作
    public EduSubjectService subjectService;
    public SubjectExcelListener(){}
    public SubjectExcelListener(EduSubjectService subjectService){
        this.subjectService = subjectService;
    }


    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if(subjectData == null){
            throw new GuliException(20001,"文件数据为空");
        }
        //判断一级分类是否存在
        EduSubject existOneSubject = this.existOneSubject(subjectService,subjectData.getOneSubjectName());
        if(existOneSubject == null){
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);

        }

        //获取一级分类id值
        String pid = existOneSubject.getId();
        EduSubject existTwoSubject = this.existTwoSubject(subjectService,subjectData.getTwoSubjectName(),pid);
        if(existTwoSubject == null){
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);

        }

    }
    //判断一级分类值是否存在
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }
    //判断二级分类值是否存在
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
